Some minor critics :
- Fix the rear end of the engine bay. The plastic part should be smoothed.
- Try to enhance reflections on the headlights housing.
- Use less shiny shader for brake discs. They're not made of chrome
- Make sure you don't have 16bits use of your background, or change picture format (or maybe change background) there is weird reflected color bands on the front of the fender.

:O Those are 3D models ? u want me to feel bad ? I mean sish :S I need, no no w8 I demand to see a wire of this crazy peace of junk... so that you prove it's a 3D model ! Really Great work ! ( hope you don't mind a bit of sarcastic talk )